Suppose 240 randomly selected people are surveyed to determine whether or not they play a musical instrument. Of the 240 surveyed, 60 reported playing a musical instrument.

[ 0.19522 < p^ < 0.30478 ]

Step-by-step explanation:

Solution:-

- A randomly selected sample of n = 240 people are surveyed to determine whether they play any instrument or not.

- The results for the survey showed that that 60 out of 240 people played a musical instrument.

- The proportion of people who played a musical instrument from the surveyed sample is:

                             p = 60 / 240 = 1/4

                             p = 0.25

- Where ( p ) is the sample proportion of the number of people who played any musical instrument.

- We are to construct a 95% confidence interval for the population proportion for which we are to determine the Margin of Error ( ME ).

- The general form is given for a confidence interval is:

                       [ p - ME < p^ < p + ME ]

Where,

                p^ : The population proportion

- The margin of error for a confidence interval is given as:

- The Z-critical value is defined by the Confidence level. So for Confidence level of 95% the Z-critical is determined by:

                   Confidence Level = 95%

                   Significance Level ( α ) = 1 - CI/100 = 1 - 95/100 = 0.05

                   Z-critical = Z_α/2 = Z_0.025

                   Z-critical = Z_0.025 = 1.96

- Therefore the margin of error would be:

- The confidence can then be written as:

                  [ p - ME < p^ < p + ME ]

                  [ 0.25 - 0.05478 < p^ < 0.25 + 0.05478 ]

                  [ 0.19522 < p^ < 0.30478 ]

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.